of toronto



H. M. JOHNSTON.

CANVAS CONVEYER.

153059 0 (\PPLICATION FILED JAN. 16. 1919 Patented June 3, .1919.

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UNrrnn s'rATEs PATENT onrron.

HOWARD M. JOHNSTON, or 'roRoNro, oNTAnro, CANADA, ASSIGNOR TO MASSEY- HARRIS COMPANY LIMITED, or TORONTO, CANADA.

CANVAS CONVEYER.

. Specification of Letters Patent. patgntgd June 3 1919,

Application filed JanuarylG, 1919. Serial No. 271,458.

To all whom it may concern Be itknown that I, I-IowAno MILTON J oI-IN- sToN, of the city of Toronto, in the county of York and Province of Ontario, Canada, machinist, have invented certain new and useful Improvements in canvasConveyers, of

which the following is a specification.

This invention relates particularly tothe canvas conveyors used on harvester binders which are usually made of approximately a suitable length and have their ends connected by straps and buckles so that the tension of the canvas may be varied as may be necessary.

V Adjustmentin this manner is so troublesome that the farmer often neglects to make adjustments when adjustments are really needed. for; the proper operation of the binder, and .my object is to devise simple,

strong and reliable adjusting means which 7 will enable an operator to make necessary adjustments rapidly and easily.

I attain my object by means of the constructions hereinafter described and illustrated in the accompanying drawings in which-e Figure 1 is a perspective view, partly broken away, showing my invention applied to an ordinary binder canvas;

Fig. 2 aside elevation of the lock ofthe device for drawing the ends of the canvas toward one another; and

Fig. 3 a perspective detail of part of the socket bar of the apparatus with one of the spacers which are fitted between the parts thereof. j

Fig. 4 is a perspective detailshowing part of one of the canvas-flaps and part of the double bar through which it is drawn.

In the drawings like numerals of'reference indicate corresponding parts in the different figures.

1 is the conveyer canvas, which is provided with the transverse bars or flights 2 in the ordinary manner. One end of the con veyer-canvas is divided to form a plurality of flaps 3, the ends of which are provided with the fiat bars 4. In the preferred form the bars 4 are 'double being connected at their ends so that in effect slotted bars are formed, the canvas passing through the slots. The other end of the conveyer canvas is pro vided with a socket bar provided with sockets adapted to receive the Hat bars 4 with canvas of the flaps folded thereon. The

mouth of each socket is at the back of the socket bar so that when the flat bars with the canvas folded thereon are located'in the sockets, any strain on the canvas flaps tends to hold the flat bars in the sockets.

- The socket bar is preferably constructed as follows: A flat bar 5 has the adjacent end of the canvas secured thereto. An L-shaped bar 6 is connected to the flat bar and is spaced therefrom by the spacers 7, which are sufficient in number to provide a separate socket for each of the bars 4. These spacers are of such a width that a slot is formed be-' tween the depending leg of the L-shaped bar 6 and the Hat bar 5 through which the canvas of the flaps 3 passes as shown. The depending leg of the L-shaped bar extends substantially level with the inner surface of the.

bar 5 so that the outer surface of the can vas passing over said leg is substantially. in the same plane as the outersurface of the bar 5. The spacers 7 are preferably formed as short rectangular tubes formed by bending up a piece of fiat metal. The central spacers have integral apertured lugs 8 formed thereon which extend through the slot and between the twoparts of the socket bar. These lugs serve for engagement with a device for drawmg the ends of the conveyer together, snnllar lugs 9 being secured to the cross bar orrflight 2 located at the.

junction of the fiapsB and the main part of the canvas. w

The device for drawing the ends of the conveyer together is preferably formed as shown in Figs. 1 and 2 of the drawings. 10

is a bar journaled in eyes formed on the endsof hooks 11, which are adapted to hook into the lugs 8 or 9. On this bar a flexible cord 12 is adapted to be wound as shown, the ends of the cord being provided with hooks 13 7 adapted to be hooked into the lugs opposite the lugs with which the hooks 11 may be engaged. One end 16 of the bar 10 is squared for engagement with a wrench. At the same end of the bar, a hook 14 is provided adapted to slide on the adjacent hook 11. This hook has a keyhole slot 15 formed in its end. In 7 part of this keyhole slot the squared end 16 may turn freely, but the other part of the slot is adapted to engage the sides of the squared end as shown in Fig. 1 to hold the bar 10 from turning.

The operation of the device is as follows: Assuming the conveyer is to be adjusted in length, the device for drawing the ends together is placed in position as shown in Fig. 1, the lock M released and the bar 10 rotated until the fiat bars 5 with the ends of the conveyor flaps wrapped thereoncan be pulled out of the sockets in the socket bar. The flat bars are then turned until the canvas lies flat between them as shown in Fi 4 and then slid along to either lengthen or shorten the flaps 3 as may be necessary and then given a half turn and replaced in the sockets. The bar 1O is then released and allowed to rotate until the flaps again take all the strain, when the device may be removed. It will be understood, of course, that there is always sufficient spring in the con-veyer to permit of the temporary overtightening described being readily effected at any time without damage to the con veyer. The whole operation takes but a very few minutes, and when the flat bars with the canvas wrapped around them are engaged in the sockets in the socket bars,'the connection between the conveyer ends will be absolutely secure, owing to the fact that the width of the sockets is only sufiicient for the bars to enter fiatwise so that they cannot rotate in the sockets. At the left hand side of the drawing in Fig. l, the flat bar has been unrolled a few more turns than the bars connected with the other flaps. When the device is in use, this bar will be rotated to shorten its flap the same length as the others and will then occupy the position in its own socket.

Vhat I claim as my invention is:

1. A convey'er canvas having a flat bar connected therewith adjacent one end on which the canvas may be rolled, and a socket bar secured to the other end of the canvas adapted to receive the flat bar with the canvas rolled thereon, the mouth of the socket being at the back of the bar.

2. A conveyor canvas having 'aflat bar I connected therewith adjacent one end on which th canvas may be rolled, and a socket bar secured to the other end of the canvas adapted to receive the flat bar with the can'- rolled thereon, the'mouth of the socket being at the back of the bar, the socket bar also having a slot formed along its forward side through which the end of the canvas secured to the flat bar passes.

3. A conveyer canvas having a flat bar connected therewith adjacent one end on which the canvas may be rolled, and a socket bar secured to the other end of the canvas adapted to receive the fiat bar with the canvas rolled thereon, the mouth of the socket bei at the back of th'eba'r, in combination with means connected with the flat bar and the socket bar for drawing the same toward one another.

e2. A device constructed according to claim 1 in which the first mentioned end of the" canvas is divided to form a plurality of flaps, each provided with a separate bar, and in which the sides of the socket bar are connected by spacers to form a separate socket for each flat bar and the canvas wound V thereon:

tween the two bars at the forward side fem ing a slot.

6. A specific construction of the socket bar accordii'ig' to claim 1 in which the socket bar is formed of a flat'ba-r'to' which theadjacent end of the canvas isconnec'ted and L-shaped bar connected to the flat bar and spaced by spacers so as to leave aspacebetween the two bars at the forward side form'- ing a slot, apertured-'lugs'being' farmed on the spacers projecting through said slot and serving for the attachment of a device for drawing the ends of the canvas together.-

Signed at the city of Tor-ontogthis second day of January, 191-91 H HOWARD M. JOHNSTON: Witnesses:

C. NORMAN ArrLriToN, FREDERICK R. FUNK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

